12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod

John W Moon wrote:

YES. Another copy of the lens, purchased new. This is explained in the above link.

This is conjecture, but I believe that when handheld, the actual IOS mechanism would kick in (provided you've turned on the switch, of course), and that would mitigate the issue described here. Not to mention that your own hand movement would disguise the jitter effect a bit.